303 骨梁の弾性特性と配向性からみた海綿骨の力学特性

Abstract

Bone has hierachical and complex structure and multiscale viewpoint is important for bone mechanics because the mechanical property is dependent on the scale factor of bone structure. Macroscopically, some relation is known between the mechanical property and bulk morphology. On the other hand, limited attention has been paid for such structural and mechanical consideration in mesoscopic and microscopic scale. In this article, the macroscopic elastic modulus of cancellous bone is examined by means of the elastic modulus of trabeculae, its orientation and volume fraction. Mean intercept length and fablic ellipsoid analysis and conventional compression test were used for the brick specimen harvested from bovine femoral head, and three point bending test was used for mechanical property of trabeculae specimen obtained from brick specimen. Some dependency of elastic modulus of trabeculae was suggested on the trabeculae orientation, and the complex relation was expected between the elastic moduli of trabeculae and cancellous bone.